Lubricant A lubricant is a substance introduced to reduce friction between moving surfaces. It may also have the function of transporting foreign particles. The property of reducing friction is known as lubricity. Lubricant is a material that reduces the friction arising due to the sliding / gliding / rolling / moving of two different components in a machinery. Friction is an undesirable process that results in (i) wear and tear of the surfaces of the moving parts (ii) loss of enormous energy as
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is clear that S1 is a non-metal. Ideal solids do not exist. However‚ graphite provides a close approximation of such an object. Graphite is a black‚ carbon-containing‚ solid material. Each carbon atom within graphite is bonded to 3 neighbors. Graphite is black because it very efficiently absorbs light which is incident upon its surface. In the 1800’s‚ scientists studied objects made from graphite plates. Since the graphite plates were black‚ these objects became known as "blackbodies". By extension
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identification. Finally‚ explain your percentage of certainty: What was confusing about this mineral? What other minerals do you think it could be? Remember‚ the minerals in the virtual lab include seven of the following: borax‚ calcite‚ corundum‚ graphite‚ gypsum‚ orthoclase feldspar‚ pyrite‚ quartz‚ talc‚ and topaz. Identification of Mineral Percent Certain Explanation of Certainty Example: Fluorite 80% certain I am almost certain this mineral is fluorite‚ but I am not completely sure. Fluorite
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Compare and contrast the structure and bonding in Ionic‚ Covalent and Metallic species. Relate the structure and bonding to the properties of the species. Ionic bonding is usually formed between a metal and a non-metal‚ Covalent between two non-metals and Metallic between two metals. Ionic Bonding; Ionic bonds tend to form between metals whose atoms need to “loose” electrons to gain the nearest noble gas configuration and non-metals that need to gain electrons. These electrons are transferred
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the virtual lab are numbered to conceal their identities‚ but the minerals will include seven of those listed below. To help you identify them‚ refer to the Mineral Identification Job Aid. • Borax • Calcite • Corundum • Graphite • Gypsum • Orthoclase feldspar • Pyrite • Quartz • Talc • Topaz 4. Post Part 1‚ Part 2‚ and Part 3 in this worksheet as an attachment to your Assignment Section. Delete the introductory instructions
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of the paper must be considered. An acid free base with a PH of between 7-9. Once you have chosen the paper you must also think about the medium‚ I prefer charcoal or graphite pencil for sketching. I high quality in either would be appropriate. (Smith pgs. 91-99) Each has qualities that are unique to the medium chosen. Graphite pencil can display great detail and precise markings while charcoal can result in rich depth and texture. Choosing the light source and the angle from which you will
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Rosalind Franklin was born the second of five children on July 25‚ 1920 in Notting Hill‚ London‚ England. Her parents were Muriel and Ellis Franklin. She was born into a Jewish family. Her family lived in wealthy and educated West London society. Her mother had aspirations to go to college‚ however was unable to as her mother did not allow it. Muriel not able to go to college made her want her children to have a good education. Her father‚ Ellis‚ was a opinionated and strict individual. He aspired
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Stainless Steels: must have at least 10% chromium A. Ferritic Stainless Steels: Iron‚ chromium + low carbon a. Magnetic b. Lowest cost c. Non-hardenable i. Can be annealed d. BCC structure e. Low carbon ii. Less than .2% f. Chromium content iii. 16-20% g. B. Martensitic Stainless Steel: iron‚ chromium + higher carbon h. Magnetic i. Martensitic Structure j. Hardenable k. High Carbon
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Safety of lithium-ion batteries June 2013 The European Association for Advanced Rechargeable Batteries Safety of Lithium-ion batteries Foreword This publication is prepared to provide information regarding the subject matter covered. The document has been prepared with the information available at the time of its publication. It is communicated with the understanding that the authors are not engaged in rendering legal or other professional services on issues covered by this report
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support set squares when drawing vertical and inclined lines Pencils: Pencils are rated on a scale of numbers and letters that describes the hardness of the graphite. Both hard and soft pencils have their uses in drawings. “H” Pencils:- “H” is the letter assigned to the hard graphite. A hard pencil produces a fine‚ light line. The hard pencils erase easily as long as you press lightly. If you press hard enough to indent the
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